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Mathematics
Mathematics
Problem
Find the length of the chord of the ellipse
9
x
2
+
25
y
2
=
225
9x^{2} + 25y^{2} = 225
9
x
2
+
25
y
2
=
225
whose midpoint is at
(
2
,
1
)
(2, 1)
(
2
,
1
)
.
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